Cost analysis geeks BillShrink have given the iPhone 4 and all of the top Android phones the side-by-side treatment, putting their features and performance up against their long-term costs. You might be surprised at the cheapest and most expensive offerings.

BillShrink's offered up this kind of smartphone comparison before, and the product is equally impressive. Each category of performance (battery life, screen resolution) and cost is granted a winner, but you'll probably skip down to the two-year cost of a data plan. With an "unlimited" (read: almost-all-you-can-eat) data plan, the Nexus One on T-Mobile is the cheapest option, but the iPhone 4 on a 200 MB plan is the cheapest option, all told.